So, Google started a Google Plus social network. Along with it is a g+ button, it looks like this:
To add g+ button, you get the code at the official Google site at http://www.google.com/webmasters/+1/button/.
Part of the code is this:
isn't Google supposed to be this ethical company who promotes good coding practices and HTML5 for a better world?
addendum: This page used to also claim Twitter and Facebook using HTML5 Custom Data Attribute as invalid. That is incorrect. Thanks to ArgV for correction.